FLORA OF VIETNAM Plants of Phong Nha - Ke Bang National Park Orchidaceae Paphiopedilum concolor (Batem.) Pfitzer
Vietnam, Quang Binh Prov., Minh Hoa Distr., Thuong Hoa Municipality, around Ban On village (17°40′21′'N, 105°58′00′'E).
Primary closed evergreen broad-leaved lowland forest on steep slopes and on tops of rocky ridge composed with solid marble-like highly eroded stratified crystalline limestone at elevation about 500-620 m a.s.l.
Lithophytic herb on vertical cliff. Leaves of typical coloration. Common.